.body {
  width: 100% !important;
  height: 100% !important;
}

.form-signin {
  width: 100%;
  max-width: 330px;
  padding: 15px;
  margin: auto;
}

.form-signin .form-control {
  position: relative;
  box-sizing: border-box;
  height: auto;
  padding: 10px;
  font-size: 16px;
}

.center_img {
  margin: auto;
  width: 100%;
  height: auto;
}

.box {
  width: 140px;
  height: auto;
  float: left;
  transition: .5s linear;
  position: relative;
  display: block;
  overflow: hidden;
  padding: 15px;
  text-align: center;
  margin: 0 5px;
  background: transparent;
  text-transform: uppercase;
  font-weight: 900;
}

.box:before {
  position: absolute;
  content: '';
  left: 0;
  bottom: 0;
  height: 4px;
  width: 100%;
  border-bottom: 4px solid transparent;
  border-left: 4px solid transparent;
  box-sizing: border-box;
  transform: translateX(100%);
}

.box:after {
  position: absolute;
  content: '';
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  border-top: 4px solid transparent;
  border-right: 4px solid transparent;
  box-sizing: border-box;
  transform: translateX(-100%);
}

.box:hover {
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.5);
}

.box:hover:before {
  border-color: #262626;
  height: 100%;
  transform: translateX(0);
  transition: .3s transform linear, .3s height linear .3s;
}

.box:hover:after {
  border-color: #262626;
  height: 100%;
  transform: translateX(0);
  transition: .3s transform linear, .3s height linear .5s;
}

button {
  padding-top: 30px;
  color: black;
  text-decoration: none;
  cursor: pointer;
  outline: none;
  border: none;
  background: none;
}

.card {
  align-items: center;
  text-align: center;
  box-sizing: border-box;
  width: 100%;
  max-width: 500px;
  height: 550px;
  padding: 50px;
  border-radius: 30px;
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  margin: auto;
  background: #e0e0e0;
  box-shadow: 20px 20px 60px #bebebe,
    -20px -20px 60px #ffffff;
}

.card_res {
  align-items: center;
  text-align: center;
  box-sizing: border-box;
  width: 100%;
  max-width: 600px;
  height: 800px;
  padding: 25px;
  border-radius: 30px;
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  margin: auto;
  background: #e0e0e0;
  box-shadow: 20px 20px 60px #bebebe,
    -20px -20px 60px #ffffff;
}


.btn {
  position: relative;
  font-size: 17px;
  text-transform: uppercase;
  text-decoration: none;
  padding: 1em 2.5em;
  border-radius: 6em;
  align-items: center !important;
  transition: all .2s;
  border: none;
  font-family: inherit;
  font-weight: 500;
  color: black;
  background-color: white;
  margin-top: 75px;
  justify-content: center;
}

.btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

.btn:active {
  transform: translateY(-1px);
  box-shadow: 0 5px 10px rgba(0, 0, 0, 0.2);
}

.btn::after {
  content: "";
  display: inline-block;
  height: 100%;
  width: 100%;
  border-radius: 100px;
  position: absolute;
  top: 0;
  left: 0;
  z-index: -1;
  transition: all .4s;
}

.btn::after {
  background-color: #fff;
}

.btn:hover::after {
  transform: scaleX(1.4) scaleY(1.6);
  opacity: 0;
}